git-pbuilder 1.33

git-pbuilder is a script to integrate git-buildpackage with pbuilder or
cowbuilder. My long-term hope is to rewrite it in Python and just
incorporate it into git-buildpackage's source base directly, but in the
meantime I've been maintaining it as a separate script.

This new release is a relatively minor bug fix. git-pbuilder has always
removed the *_source.changes file built as part of the pbuilder process,
since this file is normally useless. It's used to generate the source
package to move into the chroot, but then the build in the chroot normally
regenerates the Debian source package. The *_source.changes file hangs
around with invalid checksums and just confuses matters, so git-pbuilder
has always deleted it.

However, Debian is now increasing support for source-only uploads, which
means that source-only builds might now be interesting. One can do a
source-only build with gbp buildpackage -S. But that also
generates a *_source.changes file, one that's actually useful, and
git-pbuilder was deleting that as well. This release, thanks to work by
Guido Günther, refrains from deleting this file when doing a source-only
build.